Valve-gear for engines



(No Model.)

. P. B. RICE.

, VALVE GEAR FOR ENGINES. N'o.'245,017. Patented Aug. 2,1881.

J r Wfi'zne'ss es. I Inven i011 fiedetialcyice UNITE STATES PATENTOFFICE.

FREDERICK B. RICE, or DUNKIR'K, NEW YORK.

VALVE-GEA'R FOR ENGINES.

SPECIFICATION forming partof Letters Patent No. 245,017, dated August 2,1881.

v Application filed September 17, 1880. (No model.) I

To all whom it may concern Be it known that 1,FREDERI0K B. RICE, acitizen of the United States, residing in Dunkirk, in the county ofChautauqua and State of New York, have invented certain new and usefulImprovements in Valve-Gears for Engines, of which the following is aspecification.

My invention relates to the means for automatically operating the valveof an engine to adapt -it to varying loads and it consists of arock-shaft arranged to pass through the crankpin, and having an armprovided with an eccentric-pin for connecting with the valve-rod, incombination with a governor arranged within the crank-disk, as will bemore clearly hereinafter shown byreference to the drawings, in which-Figure 1 is aback view of an engine-crank disk, showing a similar viewof a suitable governor for operating myinvention. Fig. 2 represents avertical section in line X X, through the crank-disk also, a sectionthrough a portion of the eccentric-pin arm and through the .end of theeccentric-pin connecting-arm. Fig.

3 is a front view of the eccentric-pin arm and Fig. 4 represents a planor top view of an engine having my improved device connected 1 thereto.

A represents the crank-disk of an engine; B B, the governor-weights,connected in any v wellknown way to the arms 0 O, which arms are pivotedto the disk A, by bolts D D, so as to swing easily thereon.

E represents an arm, pivoted at one end by a bolt, E, to the arm 0, andat the other end to a triangular-shaped plate, F, by a bolt, F. Theopposite arm, 0, is composed of the parts 0 0 To the part 0 is pivoted,by a bolt, G, a short arm, G, having its opposite end pivoted to theplate F by a bolt, H. v

To the plate F is rigidly fastened, in any suitable way, by a nut, H,for instance, a pin, I, which passes through the crank-pin I. (See Fig.2.) To the opposite end of the pin I is rigidly fastened an arm, J,which carries the eccentric-pin J, to which pin J the valve-stem orconnecting-rod K is connected in any wellknown way.

(See Fig. 4, in which a suitable arrangement is shown, representing aplan L the frame.) I I M in all the figures represents the crankshaft ora portion of it. The crank-disk is formed with a depression to receivethe governor and a counter-weight, A, to balance it, but may be made inany other well-known form. It will be seen that by this arrangement thegovernor is placed within the crankdisk of the engine in any'suitableform, and operates upon the cut-off valve, and is connected to itthrough and by a pin which is fitted to a hole bored lengthwise throughthe crank-pin of the engine, the governor being attached to the insideend of this pin, and a return crank or arm being attached to the outsideend, which, in turn, carries a pin for driving the valve, and whichtakes place of the eccentric. This arm and pin, connected to the valveby an ordinary connecting-rod, are practically like such devicesheretofore used, except that the arm is not attached to the engins-crankpin rigidly, but to an inner pin which is loose within the crank-pin,the object of which is plainly manifest, viz., to vary the throw andangular advance of the eccentricpin, and thereby the travel of the valveautomatica1ly,to suit varying loads upon the engine. I claim that thisarrangement greatly simplifies automatic cut-offs of this nature.

In cut-offs of this kind heretofore used the So governor is generallyplaced within a wheel or case especially built and placed upon the shaftback of the main bearing, and operates upon an eccentric which is movedeither directly across the shaft or around its circumference, thedisadvantages of which are obvious. In mine the eccentric is dispensedwith, greatly reducing the friction to be overcome by the governor, andfirst cost, beside making a handsomer and more convenient engine. It 0operates either main or cut-01f valve.

The operation of my invention will be readily understood by reference toFig. 1. When the centrifugal force resulting from the speed of theengine is sufficient to move the weights 5 B B in the direction of thearrows f, the outer end of the short arm 0 will move in the direction ofthe arrow h and the arm E in the direction of the arrow g,nnd willthereby turn A moving eccentric-pin, J, arm 1.], pin or the plate 1 mmpin I in the direction of the rock-shaft I, carried by and within anopening arrow '5, which operation will move the arm J through thecrank-disk or a crank-pin, I, in

and eccentric-pin J in a direction from the combination with a governorarranged within 5 dotted lines a toward the center of the shaft; saiddisk, substantially as specified.

M, or toward the dotted line 8, thereby shortening the throw of thevalve, or \lCGVBlStL' FREDERICK B. RICE.

The points 'r 1" show the extreme movement Witnesses:

of the arm J in either direction. J ULIEN T. WILLIAMS,

I0 I claim as my invention EDWARD D. OBRIEN.

